Question about 1999 Chevrolet Malibu

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Car overheats frequently i add plenty of 50/50 dex cool and water daily it still tends to over heat we have a new thermostat and water pump but there is a hose missing off of the air compressor would this have anything to do with it?

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If you have a 3800 motor check your intake manifold gasket these are the symptoms that my car exhibited untill the motor locked up because it had filled the cylinders with water.
The dex cool deteriorates the gasket and the plastic intake manifold.
Replace the intake manifold and gasket, flush the dex cool out of the motor and replace with the regular green coolant.

Posted on Aug 29, 2009

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Hi. 2005 Impala 3.4. My water pump is failing for the second time in two years. Coolant flushed after first pump installed. Coolant flushed again six months ago. Pump is failing again. Thermostat...


WATER PUMP FAILURE COULD BE CAUSED BY WRONG COOLANT USE DEX COOL ANTI FREEZE.REPLACE THERMOSTAT AND BOTH RADIATOR HOSES TOP HOSE AND BOTTOM HOSE.SOFT HOSES COLAPSE LIKE PUMP HOSE.IT WILL COLAPSE FROM PUMP VACUUM CLOSING OFF SOME COOLANT FLOW.MAKE THE HEATER CORE NOT STOPPED UP IF SO IT WILL RESTRICT WATER PUMP BYPASS CAUSE EARLY PUMP FAILURE.YOU NEED 50/50 COOLANT MIXTURE YOU HALF WATER AND HALF DEX COOL DONT USE GREEN ANTI FREEZE USE ORANGE DEX COOL.I HAVE 3.4L ENGINE AND 3.1L ENGINE BEEN USING DEX COOL ANTI FREEZE SINCE I HAD BOTH VECHICLES. HAD NO WATER PUMP PROBLEMS.

Jan 23, 2011 | 2005 Chevrolet Impala

1 Answer

2004 nissan maxima overheating i replace the thermostat and the radiator cap and then had the radiator rotted out it did well for bout one month and started again. it doesnt overheat everyday thou


i would look at replacing the water pump although uncommon that the pump goes out with out leaking i have seen it happen before, the easest thing to try first is mixing your coolant different it should be a 50/50 mix if the mix is to weak the motor will over heat if its to strong the motor will take forever to warm up. alumanim motors have to have dex cool despite what other people say.

Dec 09, 2010 | 2004 Nissan Maxima

1 Answer

Changing thermostat on 04 olds alaero


1. Diconnect negative battery cable.

2. If the vehicle has an automate transaxle, remove the exhaust manifold before proceeding with the removal and installation of the thermostat.
3. Drain the cooling system. 4. Take out the bolts that hold the water pump feed pipe to the thermostat housing. 5. Lift out the thermostat-housing-to-water-pump feed pipe. 6. Pull out the thermostat. 7. Set the new thermostat in position. 8. Connect the thermostat housing-to-water-pump feed pipe.
9. Set the bolts in place that holds the thermostat-housing-to-water-pump feed pipe. Torque the bolts to 89 inch pounds. 10. Install the exhaust manifold. 11. Refill the cooling system to the proper level with a 50 / 50 mixture of distilled water / DEX Cool approved coolant. 12. Start the engine and check for leaks. 13. Make the necessary adjustments to coolant levels to assure optimum engine performance.

Dec 07, 2010 | 2004 Oldsmobile Alero

1 Answer

MY 1997 PONTIAC GRAD AM IS OVER HEATING AND I NEED TO NO WHAT THE RIGHT ANTIFREEZE TO PUT IN IT 3.1L V6


The GM recomend using GM Dex-Cool Red Coolant.
The matter of fact is that many consumers has filed out complaints againts GM Dex-Coll Reed Coolant.
http://www.consumeraffairs.com/news04/2006/08/gm_dexcool.html
http://www.consumeraffairs.com/news04/2008/09/dexcool_settle02.html
http://www.consumeraffairs.com/automotive/gm_dexcool.html
We replace it with:
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifreeze
PRESTONE.

It's up to you. Ask before, but if you decide to change the type of coolant then:
If your intention is to add coolant only, then you need:
PRESTONE 50/50
PREDILUTED ANTIFREEZE/COOLANT

If your intention is to flush the RADIATOR (Cooling System), then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifrezze
PRESTONE
EXTENDED LIFE up to 150000/mile 5 year protection.
On the back you have to read directions:
Step 1 Drain. Step 2 Flush. Step 3 Fill.
Recommended to ad 30% volume distilled water to 70% volume Antifreeze. If you flush the system and rinse with water you must add only 30% water to the antifreeze. There is more water trapped inside the engine compartment, because the thermostat is closed. Make sure to have a coolant density tester. When you finish one of 5 balls must sink, that indicates that you reached 50/50 strength. That means 50% Prestone and 50% Water, which will provide to your car a -34F degree FREEZE-UP Protection , and +265F degree BOILOVER protection. Make sure to open bleeding valve to discharge air pockets from the cooling system. Add coolant.The next day,while engine is cold open the radiator cap, and test the strength of coolant. If it is not quite right, then siphon coolant from the radiator and add antifreeze, or distilled water as necessary.
Let the car to cool down overnight and start engine. The cooling system might be cold. Untwist the coolant bleeding nipple. If there will be a jet or stream of coolant, that means the water pump is working and is O.K. After replace the thermostat. If still your car overheats then it might be a bad cylinder head gasket.

Nov 06, 2010 | 1997 Pontiac Grand Am

1 Answer

My truck only overheats when the a/c is on


Start with the simple and replace the thermostat and also replace the coolant. The Dex-cool is only good for 150,00 miles or up to 5 years and any thing longer then that, the coolant crystallizes causing a flow restriction throughout your cooling system.
There is a TSB for thew servicing of coolant that needs to be done before replacing the Dex-cool. The cooling system needs to be flushed out to get the crystal deposit out of the system if there is any.
Gm uses Preston radiator flush to clean out the radiator and heater core of any deposit that will restrict the coolant from flowing throughout the system. Once the system has been flushed out, replace the thermostat and replace the Dex-cool with a 50/50 mix of water and Dex-cool for the best result in cooling. Too much water and the coolant will boil over and too much Dex- cool will jell up causing poor circulation.
Thank you for using fixya and good luck

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On a water cooled engine... the impeller on the water pump is no longer working correctly. It has probably come loose from the input shaft and is no longer pumping water. You can prove this on a warm engine by filling the radiator to the top and then accelerating / decelerating the engine... if you don't get a change in the water level the water pump is shot.

Kelly

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buy you a new temp sensor from the dealer not autozone,try that,my suburban did the same thing cause i got a cheap piece of **** sensor from az

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